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Decent, but it's tough on the environment.
Priced as of June 6, 2026
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Prices may varyThis product ranks #6 of 12 in Transmission Fluid.Three above it ↓
Last reviewed June 6, 2026
TL;DR Toyota Genuine ATF WS (00289-ATFWS) is the OEM-specified fluid for most 2005+ Toyota and Lexus vehicles with automatic transmissions. It holds Toyota's own World Standard approval -- the only spec that counts for U-series transmissions. Community evidence on Toyota Nation and BITOG confirms consistent shudder resolution in Toyota/Lexus applications. Toyota's sealed-lifetime claim is not VOA-corroborated; the community standard is a drain-and-refill every 30,000 to 60,000 miles. Carries a Prop 65 cancer warning on US packaging. Not interchangeable with Dexron or universal multi-vehicle ATFs.
Toyota ATF WS (part number 00289-ATFWS) is formulated by ExxonMobil to Toyota's proprietary World Standard specification for U-series automatic transmissions. Toyota WS is the current factory-fill spec for most 2005+ Toyota and Lexus vehicles, replacing the older Type T-IV. The precise friction modifier package is calibrated to Toyota's specific clutch geometry, which is why Toyota service documentation states no other fluid is an acceptable substitute. Community threads on Toyota Nation and BITOG consistently confirm successful torque converter shudder resolution with fluid-only changes in Camry, Highlander, Sienna, RAV4, and most Lexus models. No independent VOA (used oil analysis) data corroborates Toyota's sealed-lifetime fill claim; community practice is a 30,000 to 60,000 mile drain-and-refill for reliability.
The correct buyer is any owner of a Toyota or Lexus vehicle with an automatic transmission manufactured from 2005 onward -- this is simply the right fluid for that application. Skip it if your vehicle requires a different OEM spec: ATF WS does not hold Dexron, Mercon LV, ZF Lifeguard, or Honda DW-1 approval and should not be used in transmissions requiring those specs.
The SDS (ExxonMobil, revision May 2016) classifies this mixture as not hazardous per OSHA HazCom 2012 -- no GHS signal word and no GHS hazard codes at the mixture level. The bottle first-aid section includes "DO NOT INDUCE VOMITING" for ingestion, consistent with the aspiration hazard of petroleum base stock components. US retail packaging carries a California Prop 65 cancer and reproductive harm warning (petroleum base stocks). SDS §8 recommends gloves during drain and pour. Spent ATF goes to a used-oil collection facility -- not down storm drains or into soil.
Most Toyota and Lexus vehicles with automatic transmissions from 2005 onward require ATF WS, including the Camry (2007+), Highlander (2008+), RAV4 (2006+), Sienna, Tacoma (automatic), 4Runner, and most Lexus models. Always confirm with your owner's manual or Toyota dealer service spec, since some models require a different fluid (Toyota T-IV is still correct for older vehicles).
Toyota does not recommend it, and for good reason. ATF WS has a precisely tuned friction coefficient designed for Toyota U-series clutch packs. Using a universal or Dexron-based fluid can cause shift quality problems, torque converter shudder, or premature clutch wear. The OEM fluid is the safe choice for in-warranty vehicles and the well-documented correct choice for out-of-warranty vehicles.
Toyota calls it a sealed lifetime fill in some applications, but the community standard on Toyota Nation and BITOG forums is a drain-and-refill every 30,000 to 60,000 miles for reliability, especially if the vehicle does frequent towing, stop-and-go driving, or trailer use. No independent VOA data exists to validate Toyota's lifetime claim.
Yes. US retail packaging for 00289-ATFWS carries a California Proposition 65 warning for cancer and reproductive harm. The basis is the petroleum-derived hydrotreated paraffinic base stocks in the formulation. Routine pour-and-fill service with gloves in a ventilated space is the standard mitigation.
Usually yes. Most Toyota automatic transmissions hold 3.5 to 5 quarts for a pan drain-and-refill (not a full flush). The 6-quart case covers a single service with fluid to spare. A complete flush (transmission cooler lines) uses 8 to 12 quarts depending on the vehicle; for that, two 6-packs are typically needed.
Marketing copy from Toyota, via Amazon. Not editorial.
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